agree with the other posters. Just the house full of junk that most of us have anyway, and then let your dd have at it however she wishes
we do online grocery shopping, and the man is usually in such a hurry to get away that we tend to have alittle heap of their delivery crates in the house at any one time. We haven't nicked them, you understand, we are just temporarily storing them they are good for storage. Also for use as climbing steps, the ends of bridges (with a plank of wood across them), beds for soft toys, footstools, very leaky boats... you get the picture.
More ethically, the organic veg delivery comes in strong stackable cardboard boxes and they are good for storage too. But less durable for some of those other uses.
As for craft materials, all of us know someone who works in an office, and people who work in offices almost always have piles of scrap paper around, with printing on just one side or whatever. Offer to assist with taking a heap off their hands every so often. We like the way the paper comes in all shapes and sizes, and sometimes there are already interesting things on one side to colour in or copy or trace over or whatever.
Worth thinking of HE life as normal life with knobs on. If you aren't already craft queen with junk modelling equipment stored away ready to make amazing blue peter items at the drop of a hat, don't beat yourself up about not turning into such a craft queen - no need to get all sorts of extra kit